package com.qk.filter;

import com.qk.utils.JwtUtils;
import jakarta.servlet.*;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;

import java.io.IOException;
@Slf4j
//@WebFilter(urlPatterns = "/*")
public class TokenFilter implements Filter {
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        // 1. 获取请求路径
        String uri = request.getRequestURI();
        //2. 判断是否是登录请求
        if (uri.contains("login")){
            log.info("登录请求, 放行");
            filterChain.doFilter(request,response);
            return;
        }//3获取请求头中的token
        String jwt= request.getHeader("token");
        //4判断token是否存在
        if (jwt==null || jwt.isEmpty()){
            log.info("token为空");
            response.setStatus(401);
            return;
        }
        //5解析令牌，错返回401
        try {
            JwtUtils.parseToken(jwt);
        }catch (Exception e){
            log.info("令牌解析失败");
            response.setStatus(401);
            return;
        }
        //放行
        filterChain.doFilter(request,response);
    }

}
